* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body {
    background-color: #e0e0e0;
    height: 100vh;
}
.header {
    height: 20px;
    text-align: center;
}
.content {
    height: calc(100% - 20px);
    display: flex;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
}
.score {
    color: #333;
    text-align: center;
}
.score span {
    font-size: 2rem;
    font-weight: bold;
    color: #3073ef;
}
.btn {
    display: grid;
    grid-template-areas: ". w ." "a . s" ". d .";
}

.btn button {
    border: none;
    box-shadow: 0px 0px 20px 5px #504f4f;
    outline: none;
    width: 60px;
    font-size: 2rem;
    transition: 0.25s;
    height: 60px;
}
.btn button:active {
    background-color: #333;
}
.btn button:first-child {
    grid-area: w;
}
.btn button:nth-child(2) {
    grid-area: a;
}
.btn button:nth-child(3) {
    grid-area: s;
}
.btn button:last-child {
    grid-area: d;
}

.container {
    width: 50%;
    min-width: 300px;
    height: 80%;
    background: #e0e0e0;
    box-shadow: inset 20px 20px 60px #bebebe, inset -20px -20px 60px #ffffff;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
@media screen and (max-width: 900px) {
    .container {
        height: 400px;
        width: 90%;
    }
    .score {
        width: 100%;
    }
}
.container .action {
    /* display: none; */
    width: 100px;
    height: 100px;
    border: none;
    outline: none;
    transition: 0.1s;
    border-radius: 50%;
    font-size: 18px;
    box-shadow: 0px 0px 30px 40px #d6d5d5;
    z-index: 1;
}

.container .action:active {
    box-shadow: none;
}

.container .cell {
    /* font-size: 12px; */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
}
